ios - Memoy leak on NSJSONSerialization JSONObjectWithData -

i have searched problem didn't proper solution. in application giving multiple recursive asynchronous calls server. using mknetworkkit performing network operation. pseudocode of implementation:

- updateforms{       [networkcall completionblock:^(mknetworkoperation *op){            dictionaryobject = op.responsejson            if(moreforms)                 [self updateforms] // recursive call            else                 save data in db , proceed further      } } 

however while executing above code memory usage getting increased 4 - 10 mbs after each call in completion block(i think on line dictionaryobject = op.responsejson).

after using instruments, showing memory leak @ line nsjsonserialization jsonobjectwithdata in mknetworkkit function:

following actual code have written:

- (void)updateforms:(int)requestcount {     /* ====================================      * update forms webserver      * ====================================      *      */     __block int blockrequestcount = requestcount;     if (uiapplication.sharedapplication.applicationstate != uiapplicationstateactive)     {         nslog(@"background time remaining = %.1f seconds", [uiapplication sharedapplication].backgroundtimeremaining);     }     // username , password     nsstring *username = [[nsuserdefaults standarduserdefaults] valueforkey:@"username"];     nsstring *userpassword = [[nsuserdefaults standarduserdefaults] valueforkey:@"password"];      nsstring *signature = [nsstring stringwithformat:@"url=%@&action=forms&timestamp=%@", apibaseurl, [[utility shareinstance] getcurrenttimestamp]];      //signature = [[utility shareinstance] encodewithurl:signature];      nsstring *signatures = [[nsstring alloc] initwithstring:[[utility shareinstance] hmacsha256forkeyanddata:request_privatekey withdata:signature]];     nsstring *timestamp = [[nsstring alloc] initwithstring:[[utility shareinstance] getcurrenttimestamp]];     nsmutabledictionary *dic  = [[nsmutabledictionary alloc]init];     [dic setvalue:apibaseurl forkey:@"url"];     [dic setvalue:timestamp forkey:@"timestamp"];     [dic setvalue:signatures forkey:@"signature"];     [dic setvalue:[nsstring stringwithformat:@"%d",requestcount] forkey:@"request_no"];      nsstring *urlgetforms = [nsstring stringwithformat:@"%@forms", apibaseurl];      //[mmprogresshud setpresentationstyle:mmprogresshudpresentationstylefade];     //[mmprogresshud showwithtitle:@"ipegs" status:@"loading..."];      if (uiapplication.sharedapplication.applicationstate != uiapplicationstateactive)     {         nslog(@"background time remaining = %.1f seconds", [uiapplication sharedapplication].backgroundtimeremaining);     }      //dispatch_async(dispatch_get_global_queue(dispatch_queue_priority_high, 0), ^{     __weak typeof(self) weakself = self;      //asynchronous code     [[apprequest shareinstance] loadrequestwithurl:urlgetforms withloadingindicator:no username:username password:userpassword params:dic success: ^(mknetworkoperation *op) {          //dispatch_async(dispatch_get_global_queue(dispatch_queue_priority_high, 0), ^{         typeof(weakself) strongself = weakself;          if (op != nil){             if (uiapplication.sharedapplication.applicationstate != uiapplicationstateactive){                 nslog(@"background time remaining = %.1f seconds", [uiapplication sharedapplication].backgroundtimeremaining);             }             // code modified             nsmutabledictionary *responsedatatemp;             @autoreleasepool {                 nsdictionary *dic = op.responsejson;                 responsedatatemp = [[nsmutabledictionary alloc] initwithdictionary:dic];             }              //nslog(@"responsedata:%@\n\n\n",op.responsestring);              [responsedatatemp removeobjectforkey:@"message"];             [responsedata addentriesfromdictionary:responsedatatemp];              if ([[responsedatatemp objectforkey:@"form_remaining"] intvalue]) {                 [responsedata removeobjectforkey:@"form_remaining"];                 nslog(@"custom forms count %lu",(unsigned long)[responsedata count]);                 [strongself updateforms:++blockrequestcount];             }else{                 [responsedata removeobjectforkey:@"form_remaining"];                 nslog(@"custom forms count %lu",(unsigned long)[responsedata count]);                  // parse response data , save in database                 [strongself parseandsavedata:strongself];                  if (strongself.backgroundtask != uibackgroundtaskinvalid){                     [[uiapplication sharedapplication] endbackgroundtask:strongself.backgroundtask];                     strongself.backgroundtask = uibackgroundtaskinvalid;                 }                  dispatch_async(dispatch_get_main_queue(), ^{                      //synchronous code                     [mmprogresshud dismiss];                     [responsedata removeallobjects];                     [customformids removeallobjects];                     [questionnaireids removeallobjects];                  });                  if (uiapplication.sharedapplication.applicationstate != uiapplicationstateactive)                 {                     nslog(@"background time remaining = %.1f seconds", [uiapplication sharedapplication].backgroundtimeremaining);                 }             }         }     } failure: ^(mknetworkoperation *op, nserror *er) {         if (er) {              if (self.backgroundtask != uibackgroundtaskinvalid){                 [[uiapplication sharedapplication] endbackgroundtask:self.backgroundtask];                 self.backgroundtask = uibackgroundtaskinvalid;             }              dispatch_async(dispatch_get_main_queue(), ^{                  //synchronous code                 [mmprogresshud dismiss];                 [responsedata removeallobjects];                 [customformids removeallobjects];                 [questionnaireids removeallobjects];             });           }         //nslog(@"error:%@", er.description);          if (self.backgroundtask != uibackgroundtaskinvalid){             [[uiapplication sharedapplication] endbackgroundtask:self.backgroundtask];             self.backgroundtask = uibackgroundtaskinvalid;         }          if (uiapplication.sharedapplication.applicationstate != uiapplicationstateactive){             nslog(@"background time remaining = %.1f seconds", [uiapplication sharedapplication].backgroundtimeremaining);         }     }]; } 

i have added weak reference self , using autorelease block not solving issue.

what can remove memory leak or doing wrong while doing recursive asynchronous calls?

thanks!